Meet the geniuses responsible for the Apple Watch

After months of waiting, orders for the Apple Watch have finally begun. While interest in the device is high among early adopters and Apple fans, it’s unclear how successful Apple’s first wearable device will be. In a March survey of analysts by Fortune, guesses ranged from 8 million to 41 million units sold in 2015. The company did not disclose sales in an earnings call this week. Still, CEO Tim Cook said he was pleased with the early results. Here are six key Apple executives responsible for everything from the product’s design to the sales plan supporting it.